4FQR:
reference: Cross-neutralization of influenza A viruses mediated by a single antibody loop., Ekiert DC, Kashyap AK, Steel J, Rubrum A, Bhabha G, Khayat R, Lee JH, Dillon MA, O'Neil RE, Faynboym AM, Horowitz M, Horowitz L, Ward AB, Palese P, Webby R, Lerner RA, Bhatt RR, Wilson IA, Nature. 2012 Sep 27;489(7417):526-32. doi: 10.1038/nature11414. Epub 2012 Sep 16. PMID: 22982990

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